There’s no way to generate electricity without some “stuff.” Whether it comprises the components of a generator, solar panels, a dynamo or some other device, this is one area for which we need some outside resources. The first step in gearing-up is to determine the bare minimum you’ll need to cover your must-haves during an emergency, whether it’s just for overnight, for several months or longer.
Solar power has the most universal potential, but don’t rule out other options if they make more sense in your situation.